Beginner to C++/DragonFireSDK NEED HELP!

Hey all,
Recently I have started developing a game in which you are a skateboarder and have to ollie (jump over) objects I have a number of questions, please respond with the question number you are answering Thankyou :)

1) "SkaterY = ViewGety(SkaterView);
if (O==1)
SkaterY -= 7; "
The code above will make the skater ascend but how would I make it so that the skater descends a couple of seconds after Ascension?

2) How would I make the Skater react to the environment around him for example how would i make the skater die when he hits an object.

3) How would I make a point system based on the length of time the skateboarder has lasted playing the game?

Many Many Thanks,
Please Reply ASAP as I am really interested.
Mallinexor.
Anyone? please
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